224 ASCLEPIADE.E. [Asclepiadea . 



Corolla broadly rotate, with scarcely any tube 10. Hoya. 



Ijeaves membranous or coriaceous. 



Stem erect. Corolla rotate 3. Asclepias. 



Stem twining. 



Corolla without appendages between the lobes. Staminal 

 corona of 5 lobes or scales on the gynostegium. 

 Corolla rotate, variegated, i in. diameter or more. Pollen- 

 masses pendulous 2. Holostemma. 



Corolla rotate, \ in. diameter. Pollen-masses transverse . 4. Tvlophora. 

 Corolla narrow-campanulate, very hairy at the throat. 



Pollen-masses erect ' 5. Marsdenia.. 



Corolla very small, nearly rotate, with scales between the 



lobes. No staminal corona 7. Gymnema. 



1. TOXOCARPUS, Wight and Arn. 



Corolla rotate, ^vitll a very short tube ; the lobes narrow-linear, slightly con- 

 torted in the bud. Staminal corona of 5 lobes or scales attached to the back 

 of the anthers, and each with an appendage inside. Pollen-masses very small, 

 attached in fours to the processes of the stigma. Stigma terminating in a long 

 point or beak. — Twiners. Cymes axillaiy. 



A geims confined to tropical Asia. 



1. T. Wightianus, Hook, and Am. ; Dene, in DC. Trod. viii. 506. A 

 twiner, wdth the young branches pubescent. Leaves glabrous, elliptical or 

 oblong, acute or very shortly acuminate, 1 to 2 in. long, obtuse at the base, 

 on a petiole of 2 to 8 lines, which is often pubescent. Flowers in small sessile 

 forked cymes, seldom half as long as the leaves. Pedicels very short. Sepals 

 lanceolate, pubescent, about 1 Ime long. Corolla-tube not half so lon^ ; lobes 

 narrow-linear, near 3 lines long, glabrous. Staminal corona longer than the 

 anthers, the lobes ovate, wath a flat lanceolate inner appendage fully as long. 

 Stigma ending in a thin linear appendage twice as long as the anthers. FolH- 

 eles thick, rusty-pubescent, about 2 in. long. — Schistoeodon Meyeni, Schau. in 

 PL Meyen. 363; Walp. Rep. vi. 479. 



Hedges near West Point, Champion ; also Wright. Not known out of S. China. 



2. HOLOSTEMMA, R. Br. 



Corolla rotate, with a very short tube ; the lobes broadly ovate. Staminal 

 corona annular, inserted at the base of the gynostegium, with 5 erect lobes or 

 nearly entire. Pollen-masses pendulous, attached in pairs by their attenuated 

 end. Stigma not beaked. Follicles smooth. — Twiners. Flowers not small, 

 deeply coloured inside, in shortly pedunculate interpetiolar umbels or racemes. 



A small tropical Asiatic species. 



1. H. pictum, Champ, in Keic Journ.Bot. v. 53. A glabrous twiner. 

 Leaves stalked, oblong, acuminate, 4 to 5 in. long, slightly cordate or rounded 

 at the base, smooth and shining above, pale underneath. Flowers at first in 

 an almost sessile umbel, which lengthens into a simple or forked raceme of 



1 in. or more. Pedicels 3 to 5 lines long. Corolla glabrous, the lobes ovate, 

 very obtuse, 4 to 5 lines long, elegantly variegated inside with purple and 

 yellow. Staminal corona shortly annular, with 5 erect lobes, equalling the 

 gynostegium, leaving broad intervals with a minute tooth in each. Follicles 



2 to 3 in. long, very spreading, thick towards the base. 



